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Loop Current
NC NC NC NC NC NC NC NC
CN3
Tel Jack
NC NC
NC NC
RX_AF
NC
NC
NC NC
NC
TX_AF
NC
NC
NC
NC
Relay (JT)
NC
NC
NC
Caller ID, Bell
IC11
NC
NC NC NC
NC
TAM play/ ringer signal
NC
IC12
NC NC
CLIP impedance (NL)
NC NC NC NC NC
15K 330P 2.2 68K 10P
IC10
0.068
SP OUT ON: 2.5V OFF: 0V
10P
Speaker
0.1 10P
1
1
, NC : No Components KX-TCD290 SCHEMATIC DIAGRAM (Base Unit_Main (Line Interface))